Charlie Sellers, left, and sister Joey Sellers.Photo: FacebookThe Brooklyn mom seriously injured in a fatal hit-and-run crash hasn’t yet come to terms with the awful news that one of her young daughters is dead, a family member told The Post on Friday.

Marsha Landias is “alert and talking” but doesn’t recall being mowed down Wednesday in the horrific crash in Mill Basin that killed her 12-year-old daughter, Joey Sellers, and left her other daughter, Charlie Sellers, 9, in a coma.

“We told her we lost Joey,” said Landias’ mother, Marie, outside Kings County Hospital. “I don’t think she understands that yet. She keeps asking us, ‘How is Joey doing?’ ”

Marie Landias said her daughter is “doing much better and improving” after being struck by the stolen minivan that police say was driven by pill-popping criminal Robert DeCarlo, 26. She underwent surgery for serious injuries and remains heavily sedated, a family friend said.

“She can only remember the events that happened before the accident,” said Marie Landias.